1*95e1ffb1Schristos /* $NetBSD: btvar.h,v 1.4 2005/12/11 12:19:20 christos Exp $ */ 263c3c68dSgwr 363c3c68dSgwr /* 463c3c68dSgwr * Copyright (c) 1993 563c3c68dSgwr * The Regents of the University of California. All rights reserved. 663c3c68dSgwr * 763c3c68dSgwr * This software was developed by the Computer Systems Engineering group 863c3c68dSgwr * at Lawrence Berkeley Laboratory under DARPA contract BG 91-66 and 963c3c68dSgwr * contributed to Berkeley. 1063c3c68dSgwr * 1163c3c68dSgwr * All advertising materials mentioning features or use of this software 1263c3c68dSgwr * must display the following acknowledgement: 1363c3c68dSgwr * This product includes software developed by the University of 1463c3c68dSgwr * California, Lawrence Berkeley Laboratory. 1563c3c68dSgwr * 1663c3c68dSgwr * Redistribution and use in source and binary forms, with or without 1763c3c68dSgwr * modification, are permitted provided that the following conditions 1863c3c68dSgwr * are met: 1963c3c68dSgwr * 1. Redistributions of source code must retain the above copyright 2063c3c68dSgwr * notice, this list of conditions and the following disclaimer. 2163c3c68dSgwr * 2. Redistributions in binary form must reproduce the above copyright 2263c3c68dSgwr * notice, this list of conditions and the following disclaimer in the 2363c3c68dSgwr * documentation and/or other materials provided with the distribution. 24aad01611Sagc * 3. Neither the name of the University nor the names of its contributors 2563c3c68dSgwr * may be used to endorse or promote products derived from this software 2663c3c68dSgwr * without specific prior written permission. 2763c3c68dSgwr * 2863c3c68dSgwr * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 2963c3c68dSgwr * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 3063c3c68dSgwr * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 3163c3c68dSgwr * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 3263c3c68dSgwr * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 3363c3c68dSgwr * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 3463c3c68dSgwr * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 3563c3c68dSgwr * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 3663c3c68dSgwr * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 3763c3c68dSgwr * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 3863c3c68dSgwr * SUCH DAMAGE. 3963c3c68dSgwr * 4063c3c68dSgwr * @(#)btvar.h 8.2 (Berkeley) 1/21/94 4163c3c68dSgwr */ 4263c3c68dSgwr 4363c3c68dSgwr /* 4463c3c68dSgwr * Brooktree color frame buffer state variables (see btreg.h). 4563c3c68dSgwr * 4663c3c68dSgwr * Unfortunately, remarkably little code can be shared between the 4763c3c68dSgwr * cg3 and cg6 drivers here, as the cg3 registers do longword-ops 4863c3c68dSgwr * `as expected', but the cg6 ones use only the upper byte. 4963c3c68dSgwr * 5063c3c68dSgwr * Still, the software color map manipulation is not completely trivial. 5163c3c68dSgwr */ 5263c3c68dSgwr union bt_cmap { 5363c3c68dSgwr u_char cm_map[256][3]; /* 256 R/G/B entries */ 5463c3c68dSgwr u_int cm_chip[256 * 3 / 4]; /* the way the chip gets loaded */ 5563c3c68dSgwr }; 5663c3c68dSgwr 5763c3c68dSgwr /* 5863c3c68dSgwr * Routines in bt_subr.c. 5963c3c68dSgwr */ 6010b1a7beSchs int bt_getcmap(struct fbcmap *, union bt_cmap *, int); 6110b1a7beSchs int bt_putcmap(struct fbcmap *, union bt_cmap *, int); 6263c3c68dSgwr 6363c3c68dSgwr /* 6463c3c68dSgwr * Compute (x / 4) * 3 and (x / 4) * 4. These are used in turning 6563c3c68dSgwr * RGB indices (which are in multiples of three) into `chip RGB' values 6663c3c68dSgwr * (which are in multiples of four). 6763c3c68dSgwr */ 6863c3c68dSgwr #define BT_D4M3(x) ((((x) >> 2) << 1) + ((x) >> 2)) /* (x / 4) * 3 */ 6963c3c68dSgwr #define BT_D4M4(x) ((x) & ~3) /* (x / 4) * 4 */ 70